Players place spell cards and modifiers into a grid, encouraging strategic optimization of attack patterns and power.

She must survive the onslaught by utilizing her vast knowledge of elemental magic and "Bullet Hell" Spell Cards.

The game is set within the sprawling, magical library of the , a key location in the Touhou Project universe.

Survivors must eventually face and defeat powerful figures from the Scarlet Devil cast, such as Remilia Scarlet .